This number is a prime.
26179818 4036870849
A devilish prime containing 6 + 6 + 6 digits that can be expressed as 6666 + 6666 + 6666 + 1. [Patterson]
A devilish prime containing 6 + 6 + 6 digits that can be expressed as 6666 + 6666 + 6666 + 1. [Patterson]